Re: [PLUG] xargs guide

[Walt Mankowski <waltman@pobox.com>]

The manpage for GNU's grep says fgrep is deprecated:

  In addition, the variant programs egrep, fgrep and rgrep are the
  same as grep -E, grep -F, and grep -r, respectively.  These variants
  are deprecated, but are provided for backward compatibility.

I'm not seeing a noticeable difference in speed using -F in my limited
testing -- searching for "nan" in 75MB of JSON spread over 25 files --
but it seems like a good idea and I'll try to remember to use it in
the future.

On Thu, Jul 30, 2015 at 04:07:39PM -0400, Tim Allen wrote:
> If you're not doing pattern matching, it is a good habit to use:
> 
>     fgrep -rl --include="*.php" 'malware url on google malware report'
> /path/to/dirs/with/php_files
> 
> fgrep is exactly the same as grep -F. If you're doing a search on a deep
> directory path with lots of files, not having pattern matching can increase
> the speed significantly. It is a hard habit to break after years of
> grepping (I'm guilty as charged), but I'm getting better about it, as it is
> the exception that I'm doing any pattern matching in my greps rather than
> the rule.
> 
> Regards,
> 
> -Tim
> 
> On Thu, Jul 30, 2015 at 11:43 AM, <bergman@merctech.com> wrote:
> 
> > In the message dated: Thu, 30 Jul 2015 00:28:51 -0400,
> > The pithy ruminations from Michael Lazin on
> > <Re: [PLUG] xargs guide> were:
> > => I also use xargs, for example, to find a malware string in php code,
> > like
> > => "find . -name '*,php' | xargs grep 'malware url on google malware
> > report' | cut -d: -f1"
> >
> > Ick.
> >
> > With a suitably modern version of grep:
> >
> >         grep -rl --include="*,php" 'malware url on google malware report'
> > /path/to/dirs/with/php_files
> >
> > Mark
> >
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